<template>
	<view :style="newStyleStr || node.styleStr">
	  <image
		show-menu-by-longpress="true"
		:mode="node.attr.mode"
		:lazy-load="node.attr.lazyLoad"
		:class="node.classStr"
		:style="newStyleStr || node.styleStr"
		:data-src="node.attr.src"
		:src="node.attr.src"
		@tap="wxParseImgTap"
		@load="wxParseImgLoad"
		/>
	</view>
</template>

<script>
export default {
  name: 'wxParseImg',
  data() {
    return {
      newStyleStr: '',
      preview: true,
    };
  },
  props: {
    node: {
      type: Object,
      default() {
        return {};
      },
    },
  },
  methods: {
    wxParseImgTap(e) {
      if (!this.preview) return;
      const { src } = e.currentTarget.dataset;
      if (!src) return;
      let parent = this.$parent;
      while(!parent.preview || typeof parent.preview !== 'function') {// TODO 遍历获取父节点执行方法
      	parent = parent.$parent;
      }
      parent.preview(src, e);
    },
    // 图片视觉宽高计算函数区
    wxParseImgLoad(e) {
      const { src } = e.currentTarget.dataset;
      if (!src) return;
	  const detail = e.detail || e.mp.detail || {}
      const { width, height } = detail;
      const recal = this.wxAutoImageCal(width, height);
      const { imageheight, imageWidth } = recal;
      const { padding, mode } = this.node.attr;
      const { styleStr } = this.node;
      const imageHeightStyle = `height: ${Number(imageheight||0).toFixed(0)}px !important;`;
	  this.$set(this,'newStyleStr',`${styleStr||''}; ${imageHeightStyle||''} width: ${imageWidth}px; padding: 0 ${+padding||0}px;`)
      // this.newStyleStr = `${styleStr||''}; ${imageHeightStyle||''} width: ${imageWidth}px; padding: 0 ${+padding||0}px;`;
	  console.log('e',e);
	  console.log('this.node',this.node);
	  console.log('this.newStyleStr',this.newStyleStr);
    },
    // 计算视觉优先的图片宽高
    wxAutoImageCal(originalWidth, originalHeight) {
      // 获取图片的原始长宽
      const { padding } = this.node.attr;
      const windowWidth = this.node.$screen.width - (2 * padding||0);
      const results = {};

      if (originalWidth < 60 || originalHeight < 60) {
        const { src } = this.node.attr;
				let parent = this.$parent;
				while(!parent.preview || typeof parent.preview !== 'function') {
					parent = parent.$parent;
				}
				parent.removeImageUrl(src);
        this.preview = false;
      }

      // 判断按照那种方式进行缩放
      if (originalWidth > windowWidth) {
        // 在图片width大于手机屏幕width时候
        results.imageWidth = windowWidth;
        results.imageheight = Number(windowWidth * (originalHeight / originalWidth)).toFixed(0);
      } else {
        // 否则展示原来的数据
        results.imageWidth = originalWidth;
        results.imageheight = Number(originalHeight||0).toFixed(0);
      }

      return results;
    },
  },
};
</script>
